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21 package org.apache.tiles.autotag.core.runtime;
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23 import java.io.IOException;
24 import java.io.StringWriter;
25 import java.io.Writer;
26 import java.util.regex.Pattern;
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28 import org.apache.tiles.autotag.core.runtime.util.NullWriter;
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35 public abstract class AbstractModelBody implements ModelBody {
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38 private static final Pattern PATTERN = Pattern.compile("^\\s*|\\s*$");
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43 private Writer defaultWriter;
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50 public AbstractModelBody(Writer defaultWriter) {
51 this.defaultWriter = defaultWriter;
52 }
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54 @Override
55 public void evaluate() throws IOException {
56 evaluate(defaultWriter);
57 }
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59 @Override
60 public String evaluateAsString() throws IOException {
61 StringWriter writer = new StringWriter();
62 try {
63 evaluate(writer);
64 } finally {
65 writer.close();
66 }
67 String body = writer.toString();
68 if (body != null) {
69 body = PATTERN.matcher(body).replaceAll("");
70 if (body.length() <= 0) {
71 body = null;
72 }
73 }
74 return body;
75 }
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77 @Override
78 public void evaluateWithoutWriting() throws IOException {
79 NullWriter writer = new NullWriter();
80 try {
81 evaluate(writer);
82 } finally {
83 writer.close();
84 }
85 }
86
87 }